Improvement in machines for making upholstery-springs



J. HARRISON, Jr.

Patented Julie 28, 1859.

N4 PETERS. Pmo-Limo n h-r. Wzlhinglon. ac

MACHINE FOR MAKING GONIOAL GOILED SPRINGS. No. 24,557.

NITED STATES PATENT OFFICE.

JAMES HARRISON, JR, OF NEXV YORK, N. Y.

IMPROVEMENT IN MACHINES FOR MAKING UPHOLSTERY-SPRINGS.

Specification forming partof Letters Patent No. 24,557, dated June 28,1859.

T0 aZZ w/wm it may concern:

Beit known that I, JAMES HARRISON, Jr., of the city, county, and Stateof New York, have invented a new and useful Improvementin Machinery forMaking Conical Coiled Springs for Upholstery and other Purposes; and Ido hereby declare that the following is a full, clear, and exactdescription of the same, reference being bad to the accompanyingdrawings, forming part of. this specification, in which Figure 1 is aside view of a machine for making coiled springs fitted with theimprovement. Fig. 2 is a transverse vertical section of the same. Figs.3 and 4 are detail views of parts of the machine.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention relates to the machinery for which I obtained LettersPatent dated January 27, 1857; and it consists in a certain mode ofapplying and operating one or more of the forming'rollcrs by whose aidthe wire is coiled upon the mandrel, whereby the coiling of the wire iseffected in a superior manner and a spring of better quality isproduced.

A is the stationary frame or bed-piece of the machine,supported onstandards B B, and carrying the bearings S S of the rotating shaft 0, atthe front end of which is the taper mandrel D.

Mis adonblc or forked leverhung on two fulcrum-pi11s,mm, arranged inline with each other,and having bolted to it a slide, E,whichcorresponds in character and position with the adjustable bed describedin the specification of my Letters Patent before referred to, and hasfitted to it the sliding carriage F, to which are bolted two plates, GG, carrying the two grooved rollers g g, which are caused to press thewire against the mandrel by the action of springs 1) p, which pull downone end of the lever M, and thus force up the other end, on which thecarriage F is supported.

I is a bar fitted to guides in the frame A, to slide longitudinallyparallel with the axis of the shaft 0 in guides attached to thestationary bed-piece A, and connected by a pin, a, with the slidingcarriage F," said bar having attached to it the swiveling fork K, thatworks in a crossed-threaded traverseserew, J, on the shaft 0. by whichtherotary motion of the said shalt is made to impart through the saidfork a motion to the carriage F back and forth along the slide E, tocause the rollers g g to travel along the mandrel D.

L is a frame of lever-like character working on two fulcrum-pins, c c,in a standard, (I, erected upon the top of the journal-box S of theshaft 0, said frame being provided with parallel ways d* (1*, to whichis fitted a carriage, N, which carries a roller, g-, of larger diameterthan the largest part of the mandrel, which roller, like the rollers gg, is intended to press the wire against the taper mandrel, springs q qbeing applied to the frame L to give the required pressure to the saidroller g The axley ofthis rolleris connected byalink, b, and twouniversal joints, 2 z, with a shaft, P, that is arranged parallel withthe m andrel-sh aft G,and fitted to a bearing in astandard, d, on thetop of the journal-box S, and another bearing in the top of a frame, Q,which is rigidly attached to the sliding bar I, and which surrounds the111andrelshaftG, as is shown in Fig. 3, which exhibits a transversesection of the mandrelshaft and the bar I and the shaft P. The shaft Phas two collars, r 1', firmly secured to it, one each side of the frameQ, to compel it to move longitudinally with the bar I, to which the saidframe Q is rigidly attached, and is fitted with a feather and groove toslide longitudinally through a collared sleeve-journal, Z, turning inthe standard d, which journal carries a spur-gear, m, gearing with aspurgear, a, of similar size, on the shaft 0, for the purpose ofimparting a rotary motion to the shaft P and roller g from the shaft 0.The longitudinal movement of the shaft P, corresponding with that of thebar I, causes the roller to have a longitudinal movement along themandrel corresponding with that of the rollers g g, the universal jointsand link connecting the axle of the said roller with the shaft Padmitting of the roller following the taper profile of themandrel. Therollers g g and their carriages are severally so adjusted as to guidethe wire in the proper spiral direction as it wound upon the mandrel Dby the rotary motion of the latter, and the operation of the machine isthe same as that of my patented machine before referred to, except thatthe roller 9 which is the last roller between which and the mandrel thewire passes in being coiled, has a positive motion imparted to it, andthat the motion of its periphery, being faster than that of the surfaceof the mandrel, causes a drawing action like that of drawing-rollers tobe produced between it and the mandrel, which drawing action, owing tothe greater velocity of the periphery of the roller being greatest onthe outer portion of the wire, tends to coil the wire, so that with thisimprovement the forming of the coil is not entirely a bending operation,as when'all the forming-rollers are caused to rotate by the friction ofthe wire upon them.

By the above described drawing action greater solidity of the metal ofthe spring is produced, and the springs are not only made more soundbutmore elastic. The operation would be rendered still more perfect bygiving the roller g amovement at a progressively increasing anddiminishing velocity, always in the same proportion to the velocity ofthe surface of the mandrel as it moves toward the larger and smallerportions of the mandrel. This may be effected by making the gears m neccentric, or by other means well known to mechanics of producing amovement of a progressively increasing or diminishing velocity.

It may be observed that the roller need not be of larger diameter thanthe mandrel, as the velocity of its periphery may be made to exceedthatof the periphery of the mandrel by giving it a greater number ofrevolutions. More than one, and indeed all, of theformingrollersemployed may be applied and operated in the same manner as the roller 9The cutting off the springs as fast as each one or any desired number ofconnected ones 7 are completed may be effected by a chiseledged cutterattached to a swinging arm, which may be operated by a cam-and-ratchetmovement actuated by the traverse-screw.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. Giving one or more of the forming-rollers a positive rotary motion atavelocity which causes its or their periphery or peripheries to movefaster than the periphery of that part of the mandrel in conjunctionwith which it or JAS. HARRISON, JUN.

Vitn esses:

NV. TUSOH, lVM. HAUFF.

